Exhaust and ventilating apparatus



(No Model.)

s. w, HUDSON. EXHAUST AND VENTILATING APPARATUS. No. 244,243. Patented July 12,1881

WITNESSES 17v VEJVTOR A 1 JWZ Wliudson, 354% MM WW u, vrrzns. Pholo-Uthognpher. Washington 0. a

UNITED STATES PATENT OFFICE.

SAMUEL W. HUDSON, OF HUDSONDALE, PENNSYLVANIA.

EXHAUST AND VENTILATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 244,243, dated July 12, 1881.

7 Application filed May 7, 1881. (No model.)

To all whom it may concern Be it known that I, SAMUEL W. HUDSON, of Hudsondale, Carbon county, Pennsylvania, have invented an Improved Exhaust and Ventilating Apparatus, of which the following is a specification.

The object of my invention is to provide a ventilating apparatus which will supply pure air to buildings and other places in regulated quantities and of an approximately uniform temperature.

Afurther object of my invention is to provide an apparatus to exhaust air from pneumatic tubes and from vessels or receptacles of all descriptions for various purposes, and when the apparatus is organized for this purpose it also constitutes a steam, gas, or compressedair motor. A

To these ends my invention consists in certain novel organizations of apparatus, which will hereinafter be fully set forth.

My invention also consists in an improved construction of tubes and piston-heads for this class of machinery.

In such buildings and places where it may be desirable I contemplate using the apparatus as a combined exhaust and ventilator, as will hereinafter be set forth.

In the accompanying drawings, Figure 1 shows a vertical section through my improved apparatus. Figs. 2 and 3 are detail sectional views, showing the shape of the tubes and piston-heads.

The casing of the apparatus is composed of a dome or pulley-chamber, A, and two tubes, B O. This casing is supported in any suitable manner with the tubes B C partly submerged in the water-tank D. Sprocket-pulleys E F are mounted in the dome A and tank D, respectively. An endless chain carrying any suitable number of piston-heads, G, passes around the pulleys and through the tubes. These piston-heads are made to fit the tube B and the small portion of the tube 0, so as to carry the air through them when the pulleyEis revolved in the direction of the arrow by any suitable power. The fresh-air-supply tube or exhausttube H communicates with the tube 0, near the upper part of its enlarged portion 0. The lower portion of the tube B is surrounded by a cylinder or casing, b, which extends somewhat below its end, and is provided at the top with the outlet 1, through which the air is supplied to the building or other place.

When this apparatus is used only as aventilator, the fresh air from outside is drawn in through the opening H, carried by the pistonheads around through the tube B, rises through the water in the casing b, and is delivered free of all impurities at the desired point through the opening I. As the moving parts of the apparatus pass through the water the heat generated by the working of the machine is absorbed and the machine is kept at a uniform temperature. Theairalsobeingpassedthrough the water is brought to an approximately uniform temperature. The water in the tank can be kept heated in winter and cool in summer, if desired.

Should it not be desired to have the air pass through the water, the tube B should be shortened so as to terminate above the level of the water in the cylinder or casing b when the machine is at work.

In some cases it might be desirable to dispense with the cylinder b and let the air escape from the water into the compartment where the apparatus is working.

When the apparatus is used as an exhaust for pneumatic tubes or other purposes the tube or vessel is connected with the pipe H, and the air exhausted or drawn up through the tubeG by the piston-heads. The water which seals the lower portion, 0, of the tube 0 will then rise therein in proportion to the vacuum created.

When the apparatus is constructed to be used solely forexhaust purposes the dome A and tube B, with the parts connected therewith, should be dispensed with. Under this organization of the apparatus it will operate as a steam, gas, or compressed-air motor. The motive power entering at the opening 11 will force the piston-heads up through the tube 0, and thus impart a uniform motion to the pulleys over which the sprocket-chain works.

It may often be desirable to supply pure air to buildings in which pneumatic tubes are employed,in which case the air exhausted from the tubes can be purified by being passed through the water and then used for "entilation; but under such circumstances it would be best to also make a fresh-air connection with the tube H,in addition to the pneumatic- ;ube connection, and control the two by a valve, so that when the apparatus is not being used for exhaust purposes the fresh-air inlet will be open, as will be readily understood. The water in the tank, in addition to absorbing the heat of the apparatus and purifying the air, also serves to seal the tube 13, its casingb, and the tube 0.

In order to reduce the size of the sprocketwheels and still retain the same area in the piston-head, I makethe tubes and piston-heads oblong in shape, as shown in Figs. 2 and 3. Of course they may be made rectangular or elliptical, if desired. When the piston-heads are so shaped I employ two chains, one near each end, and two sprocket-wheels, as shown in the drawings.

In an application for Letters Patent of the United States, filed January 31, 1881, I have described and claimed an apparatus for compressing air in which a series'ot' piston-heads travel through a compressing-tube, substantially as herein shown, and I therefore make no claim herein to such subject-matter.

I claim as my invention 1. The combination, substantially as herein set forth, of the tubes B and G, the pulleys, chain, and pistons, the fluid seal, and the airinlet opening in the tube 0.

2. The combination, substantially as herein .set forth, of the tube B, its casing b, the tube 0, having the air-inlet opening, the pulleys, chain, and piston-heads, and the fluid seal.

3. The combination, substantially as herein set forth, of the tube 0, having the opening H, thelpulleys, chain, and pistons, and the fluid sea 4. The combination of the sprocket wheel or wheels, the chain or chains, the oblong piston -heads, and the correspondingly-shaped tube.

In testimony whereof I have hereunto subscribed my name this 1st day of May, A. D. 1881.

SAMUEL W. HUDSON.

Witnesses NELLIE HoLuEs, E. O. DAVIDSON. 

